Will this method work to program a transponder key on a 2012 MKZ

[bighank]

Have a 2012 MKZ with only 1 transponder key. Owners manual says you need 2 programmed keys to program additional keys.
Found this method on the internet. Will it work on the 2012 MKZ?
 

Step 1
Enter your vehicle and put the key into the ignition and turn it to the "ON" position. Leave it in for 10 minutes and 30 seconds.

Step 2
Before 45 seconds pass, turn the key to the "OFF" position. Then turn it back to the "ON" position. Wait another 10 minutes and 30 seconds.

Step 3
Repeat the above step by turning the key to the "OFF" position within 45 seconds. Then turn it back into the "ON" position.

Turn key to the "OFF" position and then back to "ON." The key is now programmed. Turn it in the ignition to check.


I assume that 2 keys were originally supplied with the car. Manual says a maximum of 4 keys can be programmed to the car.
Does this mean since 2 keys came with the car I can only add 2 more keys to take up the 4 memory slots in the PATS system?

[bbf2530]

6 hours ago, bighank said:

Have a 2012 MKZ with only 1 transponder key. Owners manual says you need 2 programmed keys to program additional keys.
Found this method on the internet. Will it work on the 2012 MKZ?
 

Step 1
Enter your vehicle and put the key into the ignition and turn it to the "ON" position. Leave it in for 10 minutes and 30 seconds.

Step 2
Before 45 seconds pass, turn the key to the "OFF" position. Then turn it back to the "ON" position. Wait another 10 minutes and 30 seconds.

Step 3
Repeat the above step by turning the key to the "OFF" position within 45 seconds. Then turn it back into the "ON" position.

Turn key to the "OFF" position and then back to "ON." The key is now programmed. Turn it in the ignition to check.


I assume that 2 keys were originally supplied with the car. Manual says a maximum of 4 keys can be programmed to the car.
Does this mean since 2 keys came with the car I can only add 2 more keys to take up the 4 memory slots in the PATS system?

 

Hi bighank. No, that method will not work. As per your Owners Manual instrucitons, you must have 2 already programmed keys to be able to reprogram a new key, along with your old ones.

Therefore, you will need to purchase at least one new keyfob and have the old and new one programmed together.

Since you currently only have one keyfob, you will need to have a Ford Dealer or qualified automotive locksmith program your two keyfobs.

And the answer to your second question is no. When you program two keys, all previous programmed keys are erased. So you could purchase 3 new ones and have them programmed with your old one, for a total of four.

Let us know how you make out and good luck.